{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}

module Distribution.Types.Module
  ( Module(..)
  ) where

import Prelude ()
import Distribution.Compat.Prelude

import qualified Distribution.Compat.CharParsing as P
import qualified Text.PrettyPrint as Disp
import Distribution.Pretty
import Distribution.Parsec
import Distribution.Types.UnitId
import Distribution.ModuleName

-- | A module identity uniquely identifies a Haskell module by
-- qualifying a 'ModuleName' with the 'UnitId' which defined
-- it.  This type distinguishes between two packages
-- which provide a module with the same name, or a module
-- from the same package compiled with different dependencies.
-- There are a few cases where Cabal needs to know about
-- module identities, e.g., when writing out reexported modules in
-- the 'InstalledPackageInfo'.
data Module =
      Module DefUnitId ModuleName
    deriving ((forall x. Module -> Rep Module x)
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instance Binary Module
instance Structured Module

instance Pretty Module where
    pretty :: Module -> Doc
pretty (Module DefUnitId
uid ModuleName
mod_name) =
        DefUnitId -> Doc
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mod_name

instance Parsec Module where
    parsec :: forall (m :: * -> *). CabalParsing m => m Module
parsec = do
        DefUnitId
uid <- m DefUnitId
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instance NFData Module where
    rnf :: Module -> ()
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uid ModuleName
mod_name) = DefUnitId -> ()
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